String Quartet No. 12 in E-Flat Major, Op. 127: I. Maestoso – Allegro

Recording identifiers

ISRC

NLA506800447

CopyrightID (CopyrightChains transaction hash)

0xe2f73c310aca498f5ede2f5c398cc6f15186d88f6c3ba11a3b63d95f6882a3b6

OpenTimestamps proof evidence

Bitcoin-attested timestamp

2026-07-31T21:25:57Z

Bitcoin block

960468

Canonical record hash

sha256:a257c90da667701a7ef3e8dc84abf676d5f58145695d2054a3cb5f09a9fb4b91

• Verify the CopyrightID on CopyrightChains
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What this proof establishes

This recording belongs to ProofProfile's historical evidence base derived from the pre-2022 AcousticBrainz and MusicBrainz corpus. ISRC is the stable recording-level bridge from that source corpus to the authoritative cc-db-prod track record.

CopyrightChains and Bitcoin OpenTimestamps make the exact committed record independently verifiable today. The cryptographic proof does not by itself establish authorship or ownership of the underlying recording.

Read the complete pre-generative-AI provenance and verification method.